1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4a04b438e2e8af4e7302486d255e75a8cc63ab4da2287c84196f50dce6b062. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e22255b-3c15-4a68-a615-96e6703f56ab.json and https://artists.proofprofile.net/proofs/artist/6e22255b-3c15-4a68-a615-96e6703f56ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fdb144f290f63dad776524b1821bf4d6b439b51b522474514340544b5f099d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUR61200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30efdd81d71c3b8c88993298a38df7a8f9f365f4aacf7b30909be9a2f9aa03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8027e5876644e8269554b1c8fbbcac07b5e4feee9e03634f876ae0e9b111683. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d37a3a7d0e9254f73d0726b33d703112fbb043fba50895ff5705c7e23f1b17. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d1099cc7099edc36b3eb51501cf7ddc242bb5d0a2455affd39b625fc7322b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691674.
Hidden Document II (Svreca Remix) - mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5568b30cc1e8fac356e4f288ed28e27e0396d549e0c6373916a8544cf9c1c51. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b18bd5ea51c496378f24943f5525124658296081b0cc988e401507ac8562128. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79bb5368a89838f7a1bed3d630ae1a44794217c3d522f6f6e9c144b962cbe1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefc315f724020735cce357f248dc5532ab8532a97c2d11cd864c55d8d55c27a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beafcc3a432bdee53da97d342aa4963e90fdfa1ee6474e0e0d19084ef6d94a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a499501e2b01100a7254d661b3afbb8620d8bb7909a0b6129c85ac4d822312. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a4cc9d762ff1acf1fc1df46974bb2babbea1894ac3d73f7eb3a8e69e1ac940. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0530ccfa32808a0a5d394ad592cc682b1ee7cfff8e04f0ce5f00d903b61ec9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe7bb833e0097d934790ae5e6820b784ea51142a226e0f7715d90482c984bdd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008da0421d6545599cd1a07523d212054a53b3dc7aaf1853582159e3890324dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931600930.
Cirklon Bells (Edit Select Remix) - mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d728c6d023a5064edbe998a4e4bc38b0ff44b398f67efb656fbf3a91b1242c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931691684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747fe56379e5eef5ee2feb3bfae2dd3dea4a9a9857f44bf7882707f372a577e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931600931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf143682af3cfbd9086573cc1649e9b33e509c91f72d727331ee2f63980083378. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41404439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80170f4e9f6a4599253d3f5c3ef65a8e790c3dc8791d087634f725d1d483411f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41043442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67558a86214476573def5c223550fdb6237ba34b74da5092bd2ef3eea72e19. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41043444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac0a5b0d674df2a0086957656438caa736160ecf407010779cf9eed176cee6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11306101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea435da1990f0b0a9b677feb1fe80d5c2ad9682fecdbbf37f233c0a13c7ae33b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK79Z1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe7ee7a20b3ee19093f76d19f465e61d0480479795c9fd1d6bebc8a929d5a25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42227835.